package collection;

import java.util.ArrayList;
import java.util.Collection;

/*
* 集合间的操作: addAll().containsAll(),retainAll(),removeAll()
*
*
* */
public class CollectionDemo4 {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1:"+c1);//c1: [java, c++, .net]
        Collection c2= new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);//c2: [android, ios, java]
        c1.addAll(c2);//将c2添加到c1中
        System.out.println("c1:"+c1);
        Collection c3 = new ArrayList();
        c3.add("android");
        c3.add("php");
        c3.add("c++");
        System.out.println("c3:"+c3);
        boolean contains = c1.containsAll(c3);
        System.out.println("是否包含;"+ contains);
        c1.retainAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);
        c1.removeAll(c3);//删除c1中c3所包含的元素 c3不变
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);
    }
}
